Stop-valve



(No Model.)

J. ROYLANCE.

STOP VALVE.

No. 259,426. Patented June 13. 1882.

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therren %reres Parnwr erren@ JOSEPH BOYLANCE, OF SAN FRANCISCO, UALIFORNIA.

STOP-VALVE.

SPECIFICATION fornng part of Letters Patent No. 259,426, clated June 13, 1882,

Application filed January 18, 1882.

To all whom 'it may concem:

Be it known that I, J OSEPH ROYLANOE, of the city and county of San Francisco, in the State of California, have made and invented a new and useful Improvementin Stop-Valves and I do hereby declare that the followingis a full, clear, and exact description of the same, reference being had to the accompanying drawings.

My invention rclates to stop-valves for steam, water, and other pipes, and of the class or kind in which the gate or valve has a sliding move ment into and out of its chamber, and also a lateral movement against the valveseatsmhen it is lowered or moved into position across the opening or passage through the valve.

My improvement consists in a certain novel Construction of valve-operatin g device, in manner substantially as herein after described, and the combination thereof with the valve body or chamber and the valve-stem or lifting device, by which I produce an improved stopvalve. V

Referring to the accompanying drawings, Figure l is a longitudinal section through the body or chamber of the valve, showing the *position of the valve or gate and its Operating inechanisn when the water-way or passage through the body is closed. Fig. 2 is a horizontal section through the body or chamber. Figs. 3 and 4 are details of the gate or valve, the screw-stern, and the device connected with and operated by the stem for moving the valve laterally against and holding its hearing-surfaces tightly to the seats around the opening. Fig. 5 is a view of this Operating device with the valve-disks or bearing-surfaces removed.

A is the valve body or chamber, of the usual Construction, with the box or upper compartment, B, into which the gate or valve when raised is received, for the purpose of providing a clear unobstructed water-way or passage through the chamber; and O is the screw-stern by which the gate or valve is raised and lowered. This gate or valve D is formed of two disks or bearing-surfaces, e e, placed on opposite sides of a square-faced nnt or block, f,

traveling on the screw-threaded portion of thestern', and carried by it up and down or ont of and into the chamber of the valve. These disks are not permanently fixed to the block (No model.)

f, bnt'they are loosely attached to it, so that while being moved up and down or into and out of the passage or water-way they are also free to he moved laterally outward and closed tightly against the seats g( To attach the disks to the bloekj'in this nanner, I employ a short stud or dowel, h, on the inner face of the disk, and a bole, i, to receive it in that end of the block against which the disk is placed. This projection h is long enough to enter and be rctained in the hole i during all the movements of the disk,whether in sliding into and out of position or in being moved laterally to bear against and close tightly on the seats g; and where these disks or bearing-surces are made circuiar in form, as in the present construction, I locate this projection h in the center of the inner face, so as to permit thedisk to turn and be rotated upon it, and thus change the face with respect to the Valveseat g to prevent irregular wear; also, where a single projection is used, it is made of suitable diameter or thickness to support the disk and keep itfrom sagging or dropping down at one side, or otherwise getting ont of line or position with respect to the seat g. Several of these dowels 71, may be used where the hearin g-surfaces e are larger or of oblon g shape.

To move and hold the disks c against the seats g, I employ the double-acting levers 221), which are pivoted to and carried by thehlock fin such manner that at the downward movement of the gate or valve into position to close the opening through the ehamber the lower ends of each set of the levers are brought astride of and pressed against a stationary wedge or stop, m, fixed on the bottom ol' the chamber with sufficient force to spread the ends of the levers apart. Each set of these levers forms a cross, and is held to the side of the block by a short pin or pivot-bolt, Ic, and so placed between the two disks or hearingsnrfaces of the valve that while the upper end of one arni or member of the set hears against the back of the disk at one side the lower end of the same arm is against the lower portion ot' the other disk. The outer ends of these arms are cut off square, or formed with a flat surface, to coincide with the plane of the disks against which they rest, and being thus confined between the two disks, these levers will IOO act to spread them apart in a regular manuer,

equally at top and bottom, whenever any object (as a wedge) is forced in between the crossed arms or members constituting the lever. For this purpose I fix on the bottom of the chamber, beneath the screw-stem, the fixed wedge or block m, and by means ot' the screw-stem bring the gate or valve down into place be tween the two seats g, and at the same time produce the lateral movement or spreading apart ot' the disks c. The gate is fitted into the chamber of the valve, so that the amount of lateral pressure of the dsks required is Very small, and this constructiou affords a simple holding device having great power and a rapid action. The disks or bearing-surfaces of the gare are readily taken out and renewed when worn. a

Having thus fully described my invention, what I claim, and desire to secure by Letters Pateni, is- A 1. The sliding gate or stop-valve consisting of the blockf, traveling on and adapted to be moved by the Valve-stem, the crossed levers carried by and pivoted to the said block, the disks or bearing-surfaces c c, having the ends of the said leVers resting against and hearing on their nner faces, and means for spreading apart or extending the said levers when the gate or Valve is in. position between the Valveseats of the valve-chamber, substantially as described, to operate as set forth.

2. The combination, with the disks or bearin g-surfaces e e, attached to the traveling block f, of the crossed leverspp,pivoted to the sides of the said block, and the wedge or projectior m, adapted to spread apart and extend the said levers by the movement of the block f, substantially as described.

3. The im proved Valve consisting of the body A, with the way or passage having the seats g, the valve-stem, the block f, operated by said stem, as described, the disks or bearing-surfaces e e, loosely attached to and carried by said block, and the crossed levers p and the fixed stop or projection m within the chamber, forming the means for moring` the bearing-surtaces against and holding them to the valve-seats g.

JOSEPH ROYLANUE.

W'itnesses:

EDWARD E. OSBORNE, D. SELLECK. 

